Change the scale factor of texture_size from the layer's one to an estimation.

content/browser/renderer_host/image_transport_factory.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_IMAGE_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_RENDERER_HOST_IMAGE_TRANSPORT_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ skipping 51 matching lines @@
   virtual ui::ContextFactory* AsContextFactory() = 0;
 
   // Creates a shared surface handle.
   // Note: the handle may get lost at any time, a state that an
   // ImageTransportFactoryObserver gets notified of.
   virtual gfx::GLSurfaceHandle CreateSharedSurfaceHandle() = 0;
 
   // Destroys a shared surface handle.
   virtual void DestroySharedSurfaceHandle(gfx::GLSurfaceHandle surface) = 0;
 
-  // Creates a transport texture of a given size, and using the opaque handle
-  // sent by the GPU process.
+  // Creates a transport texture of a given size and scale factor, and using the
+  // opaque handle sent by the GPU process.
   virtual scoped_refptr<ui::Texture> CreateTransportClient(
       const gfx::Size& size,
+      float device_scale_factor,
       uint64 transport_handle) = 0;
 
   // Variant of CreateTransportClient() that deletes the texture on the GPU when
   // the returned value is deleted.
   virtual scoped_refptr<ui::Texture> CreateOwnedTexture(
       const gfx::Size& size,
+      float device_scale_factor,
       unsigned int texture_id) = 0;
 
   // Gets a GLHelper instance, associated with the shared context. This
   // GLHelper will get destroyed whenever the shared context is lost
   // (ImageTransportFactoryObserver::OnLostResources is called).
   virtual content::GLHelper* GetGLHelper() = 0;
 
   // Inserts a SyncPoint into the shared context.
   virtual uint32 InsertSyncPoint() = 0;
 
   virtual void AddObserver(ImageTransportFactoryObserver* observer) = 0;
   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_IMAGE_TRANSPORT_FACTORY_H_